5th Gen Legacy FMIC Fitment/Install

Incase anybody that still looks back at this thread and wonder how everything is still going.

I would absolutely recommend grabbing a 78* Celsius thermostat, part number #21200AA072

Upgraded aluminum radiator, doesn’t matter what brand. They all do the same thing. I option out for the mishimoto one (08+ wrx)

Both of these help with temp issues. I was running high 195/214 temps. After thermostat and rad, 181/194 temps.

I did however had to upgrade/repair my turbo. Long story short, called up SoCal porting up in CA and they got me all fixed up. Hybrid 20g turbo, clipped turbine and fully ported and polished.

I option out to ditch the stock plastic turbo inlet and upgrade to the perrin inlet. 15+ wrx full 3” design. Not a direct bolt on, you will need to utilize a remote oil relocation kit.

Tgv deletes and spacers, like every other subaru build.

And lastly, Id1000cc injectors with 06/07 sti fuel pressure regulator. (Stumble issue corrected)

Will all said and done, grab a flex fuelkit and got her retuned with the fmic.

Final numbers as of today, both fuel at 18psi;

344Hp/363Tq on pump

381Hp/408Tq on E85

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